The adv748x afe has eight analog sink pads, currently one of them is
chosen to be the active route based on device tree configuration. With
the new routing API it's possible to expose and change which of the
eight sink pads are routed to the source pad.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
---
drivers/media/i2c/adv748x/adv748x-afe.c | 65 +++++++++++++++++++++++++
1 file changed, 65 insertions(+)
diff --git a/drivers/media/i2c/adv748x/adv748x-afe.c b/drivers/media/i2c/adv748x/adv748x-afe.c
index 71714634efb08bd4..6b7fd4685aa4c177 100644
--- a/drivers/media/i2c/adv748x/adv748x-afe.c
+++ b/drivers/media/i2c/adv748x/adv748x-afe.c
@@ -39,6 +39,9 @@
#define ADV748X_AFE_STD_PAL_SECAM 0xe
#define ADV748X_AFE_STD_PAL_SECAM_PED 0xf
+#define ADV748X_AFE_ROUTES_MAX ((ADV748X_AFE_SINK_AIN7 - \
+ ADV748X_AFE_SINK_AIN0) + 1)
+
static int adv748x_afe_read_ro_map(struct adv748x_state *state, u8 reg)
{
int ret;
@@ -383,10 +386,72 @@ static int adv748x_afe_set_format(struct v4l2_subdev *sd,
return 0;
}
+static int adv748x_afe_get_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_routing *routing)
+{
+ struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
+ struct v4l2_subdev_route *r = routing->routes;
+ unsigned int i;
+
+ /* There is one possible route from each sink */
+ if (routing->num_routes < ADV748X_AFE_ROUTES_MAX) {
+ routing->num_routes = ADV748X_AFE_ROUTES_MAX;
+ return -ENOSPC;
+ }
+
+ routing->num_routes = ADV748X_AFE_ROUTES_MAX;
+
+ for (i = ADV748X_AFE_SINK_AIN0; i <= ADV748X_AFE_SINK_AIN7; i++) {
+ r->sink_pad = i;
+ r->sink_stream = 0;
+ r->source_pad = ADV748X_AFE_SOURCE;
+ r->source_stream = 0;
+ r->flags = afe->input == i ? V4L2_SUBDEV_ROUTE_FL_ACTIVE : 0;
+ r++;
+ }
+
+ return 0;
+}
+
+static int adv748x_afe_set_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_routing *routing)
+{
+ struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
+ struct v4l2_subdev_route *r = routing->routes;
+ int input = -1;
+ unsigned int i;
+
+ if (routing->num_routes > ADV748X_AFE_ROUTES_MAX)
+ return -ENOSPC;
+
+ for (i = 0; i < routing->num_routes; i++) {
+ if (r->sink_pad > ADV748X_AFE_SINK_AIN7 ||
+ r->sink_stream != 0 ||
+ r->source_pad != ADV748X_AFE_SOURCE ||
+ r->source_stream != 0)
+ return -EINVAL;
+
+ if (r->flags & V4L2_SUBDEV_ROUTE_FL_ACTIVE) {
+ if (input != -1)
+ return -EMLINK;
+
+ input = r->sink_pad;
+ }
+ r++;
+ }
+
+ if (input != -1)
+ afe->input = input;
+
+ return 0;
+}
+
static const struct v4l2_subdev_pad_ops adv748x_afe_pad_ops = {
.enum_mbus_code = adv748x_afe_enum_mbus_code,
.set_fmt = adv748x_afe_set_format,
.get_fmt = adv748x_afe_get_format,
+ .get_routing = adv748x_afe_get_routing,
+ .set_routing = adv748x_afe_set_routing,
};
/* -----------------------------------------------------------------------------
--
2.19.1
